A257432 Number of (7+2) X (n+2) 0..1 arrays with every 3 X 3 subblock diagonal sum plus antidiagonal minimum nondecreasing horizontally, vertically and ne-to-sw antidiagonally.

1700100, 4098078, 11883298, 36058660, 96141548, 317271378, 1037269100, 3132168159, 9367464149, 27528765545, 76077345023, 212817553945, 593399397630, 1641266694259, 4530230346513, 12467703705109, 34164329699230

Offset

1,1

Comments

Row 7 of A257426.

Links

R. H. Hardin, Table of n, a(n) for n = 1..210

Example

Some solutions for n=1
..0..0..0....0..0..0....1..0..0....0..0..0....1..0..0....0..0..0....0..0..0
..1..0..0....1..0..1....1..0..0....0..0..0....1..0..0....1..0..1....0..0..0
..0..0..1....0..0..1....0..0..0....0..0..0....0..0..0....0..0..1....0..0..0
..1..0..0....0..1..0....0..1..0....0..0..0....0..0..0....0..0..0....1..0..1
..0..0..1....0..0..0....0..1..0....0..0..0....1..1..1....0..1..1....0..0..1
..1..1..1....1..1..1....1..0..0....1..0..0....0..0..0....1..1..1....1..0..0
..1..0..0....0..0..0....1..0..1....1..0..0....1..0..0....1..0..0....1..1..1
..0..1..1....0..1..1....0..0..0....0..1..1....1..1..1....1..0..1....1..1..1
..1..0..0....0..1..1....1..0..1....0..1..0....0..0..0....0..1..1....1..1..1

Crossrefs

Cf. A257426.

Sequence in context: A127364 A251851 A083600 * A257425 A254241 A172792

Adjacent sequences: A257429 A257430 A257431 * A257433 A257434 A257435

Keyword

nonn

Author

R. H. Hardin, Apr 22 2015

Status

approved